Begin of the insertion_**As** a project member,_
_**I want to** know when start/finish dates of work packages are changed by related/child work packages (and not directly on the work package itself)_
_**so that** I'm never confused as to what or who triggered the date change._

End of the insertion ### Begin of the insertionAcceptance criteria

When dates of a work package are changed as a result of date changesEnd of the insertion Begin of the deletion StepsEnd of the deletion to Begin of the insertionchild work packages or related work packages:End of the insertion Begin of the deletion reproduceEnd of the deletion

Begin of the insertion* Journal date changes triggered by external work packages.
* Display this change in the activity tab in this format:

> * **Dates changed** by predecessor [_#14525_](https://community.openproject.org/work_packages/14525)
> * **Start date** changed to 12/04/2023
> * **Finish date** changed to 19/04/2023
> * **Duration** changed from 5 days to _6 days_

* Use one of these strings, depending on the change:
* For date changes caused by relations:
* "**Dates changed** by predecessor #{id}"
* "**Dates changed** by follower #{id}"
* For date changes caused by children:
* "**Dates changed** by child #{id}"
* Continue attributing the date change on this (the affected) work package to the user who made the change in the related/child work package.
* In the aggregation of updates, only name the responsible work package for the last update. 
* _Note from WL: If multiple work packages caused a change, informing only about the last one is sufficient as this explains the update. The knowledge about earlier updates are gone anyways during the ggregation period (suggestion from_ [_this comment_](https://community.openproject.org/projects/openproject/work_packages/46312#activity-11)_)._

### Open questions

* Are there any other attributes that can be affected by relations, apart from dates and duration?
* From Wieland's [previous comments](https://community.openproject.org/projects/openproject/work_packages/46312/activity#activity-11):
* Do we need to specify the type of relation ("changed by follower", "changed by predecessor", "changed by child" ...) or simply say something like "changed by related #{id}". 
* Note from WL: _"That would still explain the origin for an update but will remove a lot of extra information that would need to get stored and distinguished on subsequent updates."_
* Is it acceptable that the existence of a work package IDs get "leaked" to users who might otherwise not have access to it? 
* _Note from WL: This is already currently the case for the percentage done field._

###

### Archived bug report

> **Steps to reproduce**
>
>End of the insertion 1. Login to QA Edge and create 2 WPs in predecessor-follower relation
Begin of the insertion>End of the insertion 2. Set dates on both making sure that the follower starts the day after the predecessor finishes
Begin of the insertion>End of the insertion 3. Change the finish date of the predecessor by choosing any date in the future so that the start date of the follower gets automatically updated
Begin of the insertion>
>End of the insertion Begin of the deletion 4. End of the deletion Go to the follower WP Activity tab and check comments for the latest changes Begin of the insertion
>
> **WhatEnd of the insertion Begin of the deletion

### WhatEnd of the deletion is the buggy Begin of the insertionbehavior?**
>
>End of the insertion Begin of the deletion behavior?

End of the deletion * There is a comment that dates are changed, however we don't know that it was automatically changed (rescheduled) because just judging from the comment, we might think that the user changed them. Begin of the insertion
>
> **<imgEnd of the insertion Begin of the deletion

<imgEnd of the deletion class="op-uc-image op-uc-image_inline" Begin of the insertionsrc="/api/v3/attachments/51963/content">**
>
> **WhatEnd of the insertion Begin of the deletion src="/api/v3/attachments/51963/content">

### WhatEnd of the deletion is the expected Begin of the insertionbehavior?**
>
>End of the insertion Begin of the deletion behavior?

End of the deletion 1. It would be good to have an automatic message similar to &quot;Updated automatically by changing values within child work package&quot; comment whenever dates on the follower change automatically so that we know how and why dates were Begin of the insertionchanged.
>
> **Important note**
>
>End of the insertion Begin of the deletion changed. 

### Important note

End of the deletion There is already a bug ticket for missing automatic comment on parent-child work packages: <mention class="mention" data-id="46312" data-type="work_package" Begin of the insertiondata-text="#46312">#46312</mention>
>
>End of the insertion Begin of the deletion data-text="#46312">#46312</mention> 

End of the deletion **OpenProject version** Begin of the insertion
>
>End of the insertion Begin of the deletion

End of the deletion 12.5.0